Isabelle is a moderately popular girls' name in United States, ranking #166 in 2025 with 1,825 recorded births. The name reached its all-time peak in 2007 with 4,105 births ranking #79. Since 1996, the popularity has increased by 151.4%. In 2025, approximately 1 in every 881 girls born was named Isabelle. STABLE Recent data shows the name is currently stable.